What are Type I Pneumocytes?

Flattened epithelial cells that are used for gas exchange

7

What are Type II Pneumocytes?

1. Large Cuboidal cells that secrete Surfactant2. Can differentiate into Type I Pneumocytes

8

What is Hysteresis and what causes it?

1. Hysteresis is the difference between the curve for INHALATION and the curve for EXHALATION in the Pressure vs. Volume curve-Inhalation is more right2. Caused by Surfactant REDUCING the Surface Tension

9

At INCREASED Lung Volumes, what happens to Pulmonary Vascular Resistance of Extra-Alveolar Vessels?

At INCREASED Lung Volume the PVR of Extra-Alveolar Vessels is DECREASED